Shaft-coupling.



e. P. HAYNES.

Patented Jul 20, 1915 SHAFT COUPLING- l L E D l A N 2 0 1 9 I 4.

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GEORGE P. HAYNES, OF JERSEY CITY, NEW JERSEY, ASSIGNORTO;PATTERSON-ALEEN ENGINEERING COMPANY, A CORPORATION OF.NEW YORK.

SHAFT-COUPLING.

Application filed January 20, 1914. Serial No.'813,204.

To'aZZ whom it may concern:

Be 1t known that I, GEORGE P. HAYNES,

citizen of the United States, and resident of Jersey City, county ofHudson and State of New Jersey, have invented an Improvement inShaft-Couplings,-0f which the following is a specification.

This invention relatesto shaft-couplings and has for an object toprovide a coupling which may be readily positioned upon the abuttingends of two alined shafts or the adjacent ends of a broken shaft, forthe purpose of transmitting motion from one shaft or section thereof toanother, without requiring specially adjustable devices having screws orbolts for permanently securing the coupling in operative position.

It has for a further object to provide a coupling which when placed inposition will automatically grip the ends of the shafts to which it issecured and cause power to be transmitted from one shaft to another, orfrom one section of a broken shaft to the other section thereof.

It has for a further object to provide a coupling body with meansincluding a friction roller which acts in conjunction with certainsurfaces of the body, eccentric with respect to the shaft, for lockingthe roller carrying part or body to the shaft- It has for afurtherobject to provide a means for maintaining the roller abovereferred to in definite relation withrespect to the shaft so that theparts are always positioned in operative condition.

My invention consists of novel features of construction,-all as will behereinafter fully set forth. 1

For the purpose of illustrating my invention, I have shown in theaccompanying drawings one form thereof which is at present preferred byme, as the same has been found in practice to give satisfactory andreliable results,'but it is to be understood, that the construction ofthe instrumentalities of which my invention consists may be variouslyarranged and organized and that my invention is not limited to theprecise arrangement and organizationof these 1nstrumentalities as hereinshown and described. J I

Referring to the drawings: Figure 1 represents'a transverse section of acoupling embodying my invention; Fig. 2 represents a longitudinalsection of the same; and Fig.

Specification of Letters Patent; Patented Ja ls 20, v

3 represents a side elevation ofa portion of t the coupling havingcertain parts broken away to more clearly showthe internalconwstruction. Sinxilar numerals of. reference indicate like parts- 1designates the couplingsleeve l or body which is preferably of castmetal and has-a I longitudinal bore 2 therein to receive the alined ends30f two shafts'which are to be coupled, or ends of two sections: of "abroken shaft, as will be readily understood. Inter mediate the middleportion of the sleeve 1 and the respective ends thereof there is achamber & of general cylindrical contour, each chamber having its axispreferably eccentric with respect to the axis of rotation of the shafts3, the function of which construc"-" tion will appear in the descriptionofxthe adjuncts contained 'within the respective chambers.

5 designates bushings of hard metal, pref erably of steel, which arerespectively located in the chambers 4: and are properly lo cated bycasting the metal of the sleeve about them so that each normallyprovides a properly located bearing for the roller friction memberswhich will now be de scribed. In each of the chambers, and also withinthe bushings 5 there isla cylindrical roller 6, the diameter of whichisisub stantially greater than the shortest "radius' of.

eccentricity, but substantially less'than the longest radius ofeccentricity, so that when the said roller occupies that portion'oflthespace between the sleeve 5 and the shaft 3 which corresponds to thelongerradius of eccentricity, the said roller will be freely movable andthus permit free relative move o the construction and operation of theroller for the "other chamber is identical and'con sequently when bothrollers are in frictional engagement with the parts between which theyare located, movement transmitted from one shaft tothe sleeve will inturn be transmitted from the sleeve to the other shaft. In this mannertwo shafts may be effectively coupled together and transmit movementfrom one to the other without the aid of bolted clamping devices orfastening means employing screws and similar objectionable parts whichserve to permanently secure the shafts together, as it will be apparentthat, in my construction, the sleeve may be readily slipped over the endof one shaft and then brought into proper relation with the alinedopposite shaft and the coupling may then automatically couple the twoshafts as soon as one or the other of said shafts begins to rotate.Furthermore in my presentconstruction it will be apparent that shouldthe rotation of the shaft he suddenly reversed while in operation, theshock due to this action will be materially reduced and excessivetorsional strain eliminated, since the coupling will, automaticallyrelease and then automatically engage the shaft again for the reversemovement. In order that the Said rollers 6 may always be maintained withtheir axes substantially parallel to the Shafts 3, I have preferablyprovided for each a U shaped trailer or guard 7 the sides of which arearranged substantially parallel to and in close proximity to the radialside walls of the ends of the respective chambers l. In this way anytendency of the roller to assume a position other than the correctoperative one will be overcome by the contact of the sides of the guardwith the end walls of the chamber. It will further be noted that theguards 7 are pivotally attached to the respective rollers 6 so that eachmember is freely movable with respect to the other and may perform itsfunction without interference,

.8 designates a socket formed in the sleeve 1 for inserting a suitablerod or implement for manually turning the sleeve to bring the parts intobinding engagement preliminary to throwing on the power to rotate thedrivi-ng shaft. It will of course be understood that the coupling may bemanually rotated in the direction to cause an initial binding actionupon the shaft, which is continued by the rotation of the shaft. In theoperation of the device, the .cou-. pling is placed in position byslipping it over the ends of the alined abutting shafts so that theabutting ends are received within the middle part of the bore 2 and thewidest portion of the eccentric space between the shafts and the sleeves5 is at the lower portion of the coupling. The rollers 6 may take acorresponding lowermost position so that the sleeve is freely movablelongitudinally of the shafts for positioning i A suitable implem nt isnow inserted in the socket 8 and the cou ling turned to bring one of therollers into contacting with the driving shaft and by which rotation isimparted to the sleeve, and then the rotation of the sleeve will put theother roller into frictional contact with the driven shaft, so that thefollowing continued rotation of the driving shaft will cause the propercontinued binding of the parts, and the motion be thereby transmitted tothe driven shaft.

It will now be apparent that I have devised a complete unitary couplingdevice wherein the motion of one shaft is transmitted promptly andpositively to an adjacent shaft without excessive strains upon eitherthe coupling or its adjuncts. I particularly direct attention to thehard metal or steel bushings or parts 5 which are cast with the sleeve 1and form bearing surfaces capable of resisting wear and insuring longlife to the coupling. l/Vhile I have stated that these bushings arepreferably of steel they may of course be formed of any hard metalsuitable to resist wear and provide the desired friction surface. Bymaking the bushsf l, e h gh melting point thereof will enable the castiron to be cast about the bushings without injury thereto, and at thesame time will cheaply and accurately position said bushings in fixedposition within the sleeve.

By employing steel for the bushings they may be tempered after thesleeves have been cast upon them by immersing in water or oil; and asall finishing of said bushi gs has been done before they are placed inthe mold flask there is practically no machine work required except tobreach or ream out the hole 2 through the cast iron sleeve. As thebushings may be made from steel tubing cut into short lengths, it isevident that the use of such bushings is inexpensiv and provides a farmore effective surface than could be secured by the cast metal coredsurface. As the roller 6 and the shafts 3 are of steel, as well as thebushings, it is evident that I have the most effective grippingconditions. Furthermore, the trailer or guard 7 serves to maintain eachroller correctly positioned with respect to its shaft byproviding ameans to prevent the rollers from assuming an angular position.

It will now be apparent that I have d vised a novel and usefulconstruction which embodies the features of advantage enumerated asdesirable in the statement of the invention and in the abovedescription, and while I havein the present instance shown and describedthe preferred embodiment thereof which has been found practice to givesatisfactory and reliable results, it is to be understood that the sameis susceptible of modification in various particulars without departingfrom the spirit or scope of the invention or sacrificing of itsadvantages; for example, the bushing need not be continued all the wayaround the axis of the coupling as it may be continued only within thereasonable limits of the clamping and releasing movements of the roller,and the guiding meansfor the roller may be of any other suitableconstruction so long as it keeps the axial alinement of the rollerparallel to the axis of the shaft and coupling sleeve.

Having thus described my invention, what I claim and desire to protectby Letters Patent is In a shaft coupling, a cast metal sleeve providedwith a longitudinal bore adapted to directly receive the abutting endsof two shafts and also having a cylindrical chamber adjacent each endthereof and of a diameter greater than the diameter of the longitudinalbore and the end walls of said chambers being radial with respect tosaid bore, an annular steel bushing in each chamber having fixed contactwith said cast metal sleeve and having an inner circumferential surfaceeccentrically arranged with respect to said bore, said bushings being ofuniform internal shape in cross section throughout their length andoutof contact with the respective shafts, and a roller loosely mountedwithin each chamber and adapted to frictionally engage the inner surfaceof the bushing and the outer surface of a shaft positioned in said bore.

In testimony of which invention, Ihereunto set my hand.

GEORGE P. HAYNES. Witnesses:

R. M. HUNTER, E. W. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

